Mold.



J, K. WILLIAMS.

MOLD.

APPLICATION FILED APR. 18, 1908.

9 0 9 1 9 b 8 F d e t H e m P mvmn-ron momm UNITED STATES EN OFFIOEL JOHN K. WILLIAMS, OF AKRON, OHIO, ASSIGNOR ONE-HALF TO THE WILLIAMS FOUNDRY AND MACHINE COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO.

MOLD.

Specification of Letters Patent.

Patented Feb. 9, 1909.

I Application filed April 18, 1908. Serial No. 427,883.

To all whom it may concern."

Be it known that 1, JOHN K. WILLIAMS, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have. invented new and useful Improvements in Molds, of which the following is a s ecifioation.

This invention relates to molds for con-' clamped together they will constitute a complete mold, said intermediate sections being so formed that any number thereof may be interposed between two end sections, each intermediate section being provided with grooves on their opposite faces so that when the intermediate sections are in abutting relation with each other or with one of the end sectionsthey will form therewith complete molds, whereby the capacity of the device may be extended indefinitely .within reasonable limits by the interposition of the intermediate sections between suitable end or closing sections. From the foregoing it will be seen that by the employment of a pair of suitable end sections for closing the top and.

bottom of the mold, said sections being provided with grooves in one face thereo any number of units comprising intermediate sec A further object of this invention is to so construct the sections that the thickness of the metal surrounding the cavitiesof the molds will be reduced as much as. POSSlbE,

consistent with safety, to the end that t heat required to vulcanize' the. article .ina

referred to by the numerals 6 and 7.

radiate thereto easily and quickly and as equally as possible, so that all portions of the tire will be cured in substantially the same length of time, also decreasing the length of time required for'the vulcanization of the article, by reason of reduction in thickness of the metal surrounding the mold cavities, thereby shortening the time required for the curing of the articles contained in the device embodying this invention.

Other advantages constituting objects of this invention will more fully appear in the subkjoined description.

is illustrated in the accompanying drawings in which similar reference numerals indicate like parts in the different figures.

In the drawings, Figure 1 is a plan view of ractioal embodiment of this invention a mold formed in accordance with this invention. Fig. 2 is a sectional view of a mold such as is shown in Fig. 1 on line X of Fig. 3,

and, Fig. .3 a view in side elevation, enlarged, of the mold shown in Fig. 1 with portions thereof broken away on line Y of Fig. 2

to better illustrate the interior construction thereof.

Referring to the drawings in detail, 1 and 2 denote the top and bottom mold sections respectively; These sections are identical an consist of metallic rings each having in one face an annular groove 3 of a shape which it is desired to impart to the vulcanized article. These sections 7 are provided with an outwardly-extending series of pairs of individual lugs, the members of each air being referred to by the reference numerals 4 and 5. The members 1 and 2 are further provided interiorly with a second series of inwardlyprojecting pairs of lugs, the members thereof ,-'spaced' :apart' from the rooves 3 for a purto h e-later describe itfi'sdesired to vulcanize a hollow article The I ously, I emp oy intermediate sections 17- 40 ill? - ating registration therewith.

- circular grooves the flange ot the core extending into the.

groove 1 The member 1 is then super-r. posed on the member 2 in such a mannerthat the grooves 3 ct both members will be in registering relation, thereby positioning the The two members 1 and 2 are then same. clam )ed together by means of bolts 13 video with heads 15, nuts 14 and Washers 16. These. bolts are of such a length as to be capable oi ein r inserted between the members 4 and 5 of each pair in the series of lugs projecting from the outer periphery of the mold niieinbers 1 and. 2 as well as between the members 6 and 7 of each pair of in s interiorly formed on these members, an by the use of the washers 16 which extend laterally sulliciently to engage and lap these lugs the two members 1 and 2 are clamped together by the action of drawing up the nuts 14. The mold thus set up is then )laced in a vulcanizii'ig heat until the article contained in the mold cavities has been properly cured, after which the. "bolts are released, the memhere so )arated and the vulcanized article remover In order to make this device capable of vulcanizing a lurality of articlessimultaneprodesigned to be interposed between the sections .1 and 2 comprising annular members formed with grooves 18 in their 0 posite faces sin'iila-r to the grooves 3 in the aces of the sections 1 and 2 and capable of cooper- The members 17 are r so provided with suitable registering grooves to receive the flanges of cores in similar manner to the grooves 1]. of the members 1 and 2 20 registering with and forming openings in cooperation with the seiniaiircular grooves 10 of the members 1 and 2. The inner and outer faces of these intermediate sections 17 are provided with respectively, for a purpose to be later described. Extending from either the outer or inner faces or between thegrooves 21 and 22 of the intermediate sections 17 are a plurality or preferably radial openings 23 separated from each other by two concentric series of lugs the outer series referred to by the referencc numeral 24.- and the inner series. by the reiecncc numeral 25, the members of each series ',circuinterentiallv-iormed grooves 21 and 22,

securing the latter in position.

and they also have semibeing preferably arranged in radiall alinement with the corresponding; inen'ibers of the other series, the members of each series being placed in annular arrangement with each other, and between the series 2+1 and 25 is an annular space 26.

In setting up a mold embodying intermediate sections, such as is illustrated. in Fig. 3 of the drawings, the end section 2 will be placed on some suitable support, and an article, such as a tire provided with a core, will be laid in the groove 3. intermediate section 17 will then be superposed on the section 2 and positioned thereon by bringing the groove 18 thereof into cooperating registering relation with the .groove 3. The groove or semi-mold cavity 18 in the upper face of this section 17 is then properly filled, as has been described with reference to the semianold cavity in the member 2. A second section 17 is then superposed on the first section and positioned in the same manner as has been de scribed with reference to the former and this building up of the intermediate sections 17 and the filling of their moldcavities will be carried on indefinitely. When a suflicient number of sections have been nested in this manner the top or upper section. is placed on the upper section 17 and positioned with respect thereto by bringing the semimold cavity 3 thereof into cooperating registering relation with the corresponding semi-mold cavity 18 in the upper superposed section 17. The entire nest of molds are then clamped together by means of bolts 13, as has been already described with reference to asingle cavity mold.

The openings formed by the registering grooves 10 of the sections 1 and 2 and 20 of the sections 17 constitute overflow openings into which surplus material caused by the expansion of the rubber under heat is permitted to esca e to relieve undue pressure on the device, but as this is common in the 'art a further description thercol is believed to beunnecessary.

After vulcanization, the nuts 14 are released, the end section lifted off and the tire contained in the mold cavity thereof removed. The first or upper intermediate section is then removed in a like manner and this is kept up until the entire mold has been emptied.

The grooves 21 and 22 in the intermediate sections and the beveling of the end sections, together with the formation of the openings 23 and 26 through the central portions of the intermediate sections causes the thickness of metal which surrounds each of the mold cavities to be reduced as much as possible, thereby permitting the vulcanizing agent, which is usually steam, to act quickly on the-articles contained in the cavities of the mold. The openings 23 and 126 permit the steam to circulate through the medial por The first I 'tions of the intermediatesections 17, thereby bringing it closer to the articles contained in the mold cavities and thus permits it .to actquickly on these articles.

It will be seen that the formation of the grooves in and the openings through the medial portions of the intermediate sections 17 constitutes the most important element of this invention for reasons already given,

by which said results may be accomplished, when a device constructed in' accordance with this invention is employed.

Attention is directed to the'fact that the size, depth and cross-sectional configuration of the circumferential grooves'21 and 22, aswell as the depth, number and area of the openings 23 may be as shown in the drawings or maybe fvaried as -desired and What I claim, is 1 A vulcanizing mold comprising a pair'of still be within the scope of thisinvention.

annular endsections having grooves in their opposing faces and an interme di ate section adapted to be interposed between said endsections, said intermediate section having annular grooves in its opposite faces regis, tering with the grooves in the faces of said end sections for forming mold cavities, said ...intermediate section provided with a lpluralthe body thereof and positioned intermediate.

ity of transverse openings extending t roLgh the mold grooves therein butspaced apart therefrom, substantially as shown and .de

scribed and for the purpose set forth.

2. A vulcanizing mold comprising a pair of annular end sections having grooves in their opposing faces, an intermediate section adapted to be interposed between said end sections, said intermediate section having annular grooves in its opposite faces registering with the groovesin the faces'of said end sections for forming mold cavities, said intermediate section further provided with circumferential grooves in the outer and inner faces thereof, and 'a(plurality of openings extending between sai circumferential grooves to permit the circulation of a vulcanizing agent therethrongh, substantially as shown and described and for-the purpose set forth. I 3. A vulcaniz-ing mold comprising a pair of annular endsections having grooves in their Opposing adapted to be interposed betweensaid end sections, said intermediate section further provided with a plurality of transverselyextending openings, through the body por-' tion'thereof positioned intermediate'the mold grooves therein and spaced apart therefrom, the portions of said intermedlat'esection between said transverse openings being formed into a series of lugs by said openings, substantially as shown and described and for the 5. A'vulcanizing mold having as one of its elements asection formed of two portions, spaced apart-and. provided, on the opposite faces, an intermediate section lmold having as one of its faces thereof withgrooves constituting semimold cavities, a plurality of concentric series of integral ltgs extendingbetween said por-' tions, the members of each series of lrigs being spaced from adjoining members 111 saidseries and from. the members of adjoining setherebetween,

rise by 0 enings extendinf escribed and for substantia' ly as'shown and the purpose set forth. a In testimony'whereof I have hereunto set my hand in presence oftwo subscribing witnesses;

JOHN K. WILLIAMS. Witnesses: I

O. E; HUMPHREY,

GLENARA Fox.' 

